I've been researching roto-hammers to add one to my toolbox.
I've had good luck with Milwaukee products in the past,So that would be my first choice.
My primary uses are for driving ground rods, and drilling through concrete for SE cable (2" core bit or smaller)
However I would like the ability to drill to 4" if the situation arises.
What I don't fully understand is the difference between SDS,SDS MAX,or Spline Drive.
I'm also confused with the choice of "thinwall" and "thickwall" core bits and their specific applications.
Thanxs, Dave
